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27 Oct 2010, 01:59

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A

B

C

D

E

Difficulty:

5% (low)

Question Stats:

77%(01:44) correct
23%(00:48) wrong based on 367 sessions

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Displays of the aurora borealis, or "northern lights", can heat the atmosphere over the arctic enough to affect the trajectories of ballistic missiles , induce electric currents that can cause blackouts in some areas and corrosion in north-south pipelines.

A.to affect the trajectories of ballistic missiles,induceB. that the trajectories of ballistic missiles are affected,induceC. that it affects the trajectories of ballistic missiles are affected and inducesD.that the trajectories of ballistic missiles are affected and inducesE. to affect the trajectories of ballistic missiles and induce

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27 Oct 2010, 05:14

1

This post receivedKUDOS

The displays can heat the atmosphere to do two things. 1. to affect the trajectories blah, blah and 2. ( to) induce electric currents blah blah . So an – and - is required between - missiles - induce - to complete the series with proper parallelism.

E is the correct answer.
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04 Jan 2012, 12:27

+1 E

"enough to" is the idiom. B, C, and D out.There are two effects of these northern lights: affecting the trajectories of ballistic missiles AND inducing electric currents. AND is needed. E is the answer.
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27 Sep 2012, 03:24

Lvnguyen87 wrote:

E[enough to..] and [the northern lights heat and induce]A implies that the missile induce[s] no

I chose A

I assumed "can heat the atmosphere over the arctic enough to affect the trajectories of ballistic missiles" to be a modifier modifying Aurora lights. Why is this wrong? So I read the question as "Displays of the aurora borealis, BLAH BLAH BLAH (modifier) , induce electric currents that can cause blackouts in some areas and corrosion in north-south pipelines.

So 'Displays' is plural and goes with 'induce' and by virtue of which other answer choices are wrong. What did I miss?

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29 Sep 2012, 08:09

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ace312 wrote:

Lvnguyen87 wrote:

E[enough to..] and [the northern lights heat and induce]A implies that the missile induce[s] no

I chose A

I assumed "can heat the atmosphere over the arctic enough to affect the trajectories of ballistic missiles" to be a modifier modifying Aurora lights. Why is this wrong? So I read the question as "Displays of the aurora borealis, BLAH BLAH BLAH (modifier) , induce electric currents that can cause blackouts in some areas and corrosion in north-south pipelines.

So 'Displays' is plural and goes with 'induce' and by virtue of which other answer choices are wrong. What did I miss?

Hi ace312, I don't think "can heat the atmosphere over the arctic enough to affect the trajectories of ballistic missiles" is modifying Aurora lights. Consider below example (I just made up),

Sunlight from sun, can heat earth's surface - here Sunlight is heating earth's surface, not sun, the same way Displays are heating atmosphere, not the aurora borealis in the below example. Hope this clears your doubt or reply if you have more questions.

student26 wrote:

Displays of the aurora borealis, or "northern lights", can heat the atmosphere over the arctic enough to affect the trajectories of ballistic missiles , induce electric currents that can cause blackouts in some areas and corrosion in north-south pipelines.

A.to affect the trajectories of ballistic missiles,induceB. that the trajectories of ballistic missiles are affected,induceC. that it affects the trajectories of ballistic missiles are affected and inducesD.that the trajectories of ballistic missiles are affected and inducesE. to affect the trajectories of ballistic missiles and induce

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01 Oct 2012, 09:26

daagh wrote:

The displays can heat the atmosphere to do two things. 1. to affect the trajectories blah, blah and 2. ( to) induce electric currents blah blah . So an – and - is required between - missiles - induce - to complete the series with proper parallelism.

E is the correct answer.

If the sentence uses "inducing" after comma in option A, will it be considered right?

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27 Feb 2013, 15:34

Damn!! GMAT is a tricky test. The point is that we should never ever underestimate the need to read and understand the sentence!I choose A because the sentence was correct and parallel. Then when i saw the OA i realized" induce electric currents that can cause X (blackouts in some areas) and Y (corrosion in north-south pipelines)" need and before it to make it parallel with the first part .
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01 May 2014, 16:54

Hello from the GMAT Club VerbalBot!

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21 Aug 2016, 02:16

Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.